Chemistry - December 2006

2006-12-05 15:07:41 · 6 answers · asked by gymbum 1

2006-12-05 15:02:15 · 3 answers · asked by louis b 1

please help...

2006-12-05 14:52:37 · 5 answers · asked by sarahmuaaz 1

1. Write out, balance, and classify this word equation
Sulfuric acid reacts with calcium arsenate to produce arsenic acid and calcium sulfate.
2. Change first into a an ionic equation, then a net ionic equation (balance first if you can) Pb(NO3)2 + KCl reacts to get KNO3 +PbCl 2
3. Balance redox reaction: BrO-3 + Cr3 reacts to get Br2 + Cr2O7-2

2006-12-05 14:40:36 · 2 answers · asked by Anonymous

I broke a newer candy thermometer in a kitchen drawer; is mercury still used or did they switch to another element? If so, when was this change made? Any danger in using other utensils in the same drawer?

2006-12-05 14:31:34 · 5 answers · asked by iiifrdst 1

I'm in college and I have a chemistry final tommorrow but I have a bad case of Lazy Person Syndrome. Please make me study, because I suck in chemistry.
Do you have any websites where I can get online?

2006-12-05 14:24:56 · 9 answers · asked by ericaofgordon 5

2006-12-05 14:24:49 · 4 answers · asked by Anonymous

ill say it again..

if a small balloon is squeezed between the hands, what happens to its volume?what happens to the pressure inside the balloon?explain using the kinetic molecular theory.

2006-12-05 14:23:47 · 4 answers · asked by jen R. 2

Which of the following represents a neutralization reaction?
A.Ca(OH)2 ---- > Ca^2+ (aq) +2 OH- (aq)
B.Al2(SO4)3 --- > 2 Al3+ (aq) +3 SO4^2- (aq)
C.H2SO4 --- > H+ (aq) + HSO4^2- (aq)
D.Ca(OH)2 + 2 HCI --- > CaCI + 2 H2O

2006-12-05 14:21:00 · 1 answers · asked by cetinnovations 1

2006-12-05 14:17:15 · 2 answers · asked by ally n 2

How many moles of NaOH must be added to 1.0 L of 1.4 M HC2H3O2 to produce a solution buffered at each pH?
(a) pH = pKa
mol
(b) pH = 3.73
mol
(c) pH = 6.36
mol
please help and explain ........

2006-12-05 13:47:27 · 1 answers · asked by tanny 1

2006-12-05 13:37:17 · 6 answers · asked by know_it_all_ca 1

1. A regular arrangement of ions or molecules in a solid substance?
2. The number of bonds an atom likes to make in order to become stable?
3. Formed by atoms or metals, in which the outer electrons of the atoms form a common electron cloud?
4. More than one atom, bound together by covalent bonds?
5. Another term to describe "electron shells".
6. The smallest part of an ionic compound?
7. A group of atoms, covalently bonded, which has a net electrical charge?

ty any help would be nice.

2006-12-05 13:33:51 · 3 answers · asked by dylanklassen 2

Why is the answer ZnS, where did the CO3 go

2006-12-05 13:33:34 · 1 answers · asked by Anonymous

This is the last thing I need to finish my hmwk I came up with this formula and need to balance it seems pretty easy but my brain is fried from doing excessive homework so I can't figure it out and it's frustrating me.

NaCl CaSp -------> NaSp + CaCl2

2006-12-05 13:19:26 · 2 answers · asked by Silentspeedster 2

I have trouble grasping this concept. If a Hydrogen atom has 1 electron, if it gains an electron (which is the only possibility; it can't possibly lose all of its electrons, yes?) then it becomes negative. Is there such a thing as an H- ion, then?

2006-12-05 13:01:39 · 8 answers · asked by Hellogoodbye 2

Why is the outside of a penny made of copper as opposed to zinc. I know that is has something to do with the metal activity series, but I need an elaboration.

2006-12-05 12:57:19 · 3 answers · asked by Anonymous

What's the difference between Ionic Radius and Atomic radius of an element?

2006-12-05 12:56:08 · 2 answers · asked by conkers 1

i have this question for chemistry and need help. And could you also tell me which one is a chemical change and which is a physical change. Serious and detailed answers please!!

2006-12-05 12:52:14 · 4 answers · asked by Rubin D 1

a)scintillation detectors
b) Geiger-Muller counters
c) film badges
d) none of the above

2006-12-05 12:45:36 · 2 answers · asked by ShanAnn B 1

2006-12-05 12:44:15 · 3 answers · asked by Shalla W 1

1) Ba2+ , S2-
2) Li+ , O2-
3) Ca2+ , N3-
4) Cu2+ , I-

Any help is appreciated...

2006-12-05 12:42:18 · 4 answers · asked by theweirdguy1 2

a) PET
B) CT
C) MRI
d) Radioimmunoassay
e) More than one answer is correct

2006-12-05 12:40:39 · 1 answers · asked by ShanAnn B 1

This is a lab...

the objective is to estimate the densityy of gernanium based on the densities of carbon-graphite, silicon, lead and tin

any ideas?

2006-12-05 12:29:13 · 1 answers · asked by wat8besha 1

Copper
Magnesium
or
Zinc?

2006-12-05 12:07:18 · 6 answers · asked by Anonymous

In chemistry we are learning about thermochemistry. We are learn about heat of formation.
Acetylene(gas) has a low value for heat of formation
+ 226.6 KJ/mol
my teacher tells me that is has a lot of potential energy? but how? is it because it is endothermic? if so why would it do that?

2006-12-05 12:04:58 · 3 answers · asked by avalentin911 2

2006-12-05 12:01:05 · 3 answers · asked by eddyb 1

1.sodium hydrogen carbonate
2.solid carbon dioxide
3.calcium carbonate
5. Magnesium hydroxide

2006-12-05 11:55:21 · 5 answers · asked by Anonymous

2006-12-05 11:54:23 · 4 answers · asked by ♥IslamForever♥ 5

And also how do I figure out which equation is net ionic and which is molecular

2006-12-05 11:51:44 · 2 answers · asked by Lonely 2